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Finding the Fourth Proportional to 13,676.66, 20,515.08 and 4,911.65

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Solution

The fourth proportional to 13,676.66, 20,515.08 and 4,911.65 is: 7,367.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,676.66 : 20,515.08 = 4,911.65 : x
  2. Step 2: Convert to fraction form
    13,676.66/20,515.08 = 4,911.65/x
  3. Step 3: Cross multiply
    13,676.66x = 20,515.08 × 4,911.65
  4. Step 4: Simplify right side
    13,676.66x = 100,762,892.68
  5. Step 5: Solve for x
    x = 100,762,892.68/13,676.66
  6. Step 6: Final answer
    x = 7,367.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.